Expansion joint setting apparatus



Dec. 5, 1939.

G. T. NELSON 2,182,302

EXPANS-lON JOINT SETTING APPARATUS Filed Oct. 28, 1938 2 Sheets-Sheet l In ventor A tiorneys Dec. 5, 1939. G. T. NELSON EXPANSION JOINT SETTING APPARATUS Filed OCt. 28, 1938 2 Sheets-Sheet 2 In vent or A iiorneys w e W/Ni 1-- a N mm M \N T W G f 4% m m W d U I flu V PM, m

Patented Dec. 5, 1939 UNITED STATES 2,182,302 EXPANSION JOINT SETTING A IPARATUS George T. Nelson, Lebanon, Tenn.

Application October 28,

3 Claims.

This invention relates to means for setting an expansion strip in concrete highways and the like, the general object of the invention being to provide a T-shaped member for extending laterally across a highway and provided with means for holding an expansion strip in place and also provided with means for holding dowel pins in position.

The present invention is an improvement over that forming the subject matter of my Patent No. 2,125,194, dated July 26, 1938.

This invention also consists in certain other features of construction and in the combination and arrangement of the several parts to be hereinafter fully described, illustrated in the accompanying drawings and specifically pointed out in the appended claims.

In describing the invention in detail, reference will be had to the accompanying drawings wherein like characters denote like or corresponding parts throughout the several views, and in which:

Figure l is an elevational view of the device.

Figure 2 is a top plan view thereof.

Figure 3 is a section on the line 33 of Figure 2.

Figure 4 is a section on the line 4- i of Figure 1.

Figure 5 is a fragmentary plan view of the adjustable member which cooperates with the stem of the T-shaped member for clamping an expansion strip.

Figure 6 is a perspective view of the sliding bar for turning the pin holding hooks into operative and inoperative position.

Figure '7 is a view of one of these hooks.

In these drawings the numeral l indicates the T-shaped member, the stem of which is formed with the thick upper part i and the thin leg portions I", these leg portions being spaced apart and preferably of the shape shown in Figure 1 which shows said leg portions tapering downwardly with the lower ends straight to rest upon the sub-grade of the highway. Arms 2 extend outwardly from the head of the T-shaped member and these arms are arranged in pairs, one arm of the pair being arranged at one side of the member and the other arm at the other side and the two arms of each pair are in alignment with each other. Each arm is of angle-shape in cross section and the vertical part of each arm is formed with a recess 3 in that flange which parallels the stem of the T-shaped member for receiving a portion of a dowel pin P. A plurality of plates 4 are provided for clamping an expansion strip S against the stem of the T-shaped 1938, Serial No. 237,537

member and each plate has a flange 5 at its upper edge formed with a slot 6 for receiving a bolt 7 carried by an arm 2 of the T-shaped member, it

being seen that all the plates '4 are arranged at one side of the stem of the T-shaped member. .5 The upper end of the plate is also formed with a slot 8 for receiving a bolt 9 carried by the arm so that these plates'can be adjusted towardand away from the stem of the T to form a space between themselves and the stem of the T to receive the expansion strip S. A plurality of vertically arranged tubular members it are attached in spaced relation to that side of the part 'I of the T-shaped member opposite the side which engages the expansion strip and each tubular member rotatably receives the straight part ll of a dowel pin holding hook H. Each hook, as shown in Figure 7, is formed with a bent lower part 2 for engaging the pin and an upper crank part lit, the upper end of which fits in a notch 14 in abar 55 which passes'through holes it in arms 2 so that by moving this bar longitudinally the hooks are rocked in the tubular members it to engage the parts l2 -with the pins P or to disengage said parts i2 from the pins. i

.This bar i5 is formed with a projection ll which is arranged under a notch l8 in one edge of the head of the T-shaped member and a lever, shown in dotted lines at IS in Figure 1 is adapted to be passed through the notch with its forked end engaging the projection so that by moving this lever the bar l5 can be moved longitudinally to rock the hooks H.

A longitudinally extending strip 20 is connected with the inner edges of the plates 4 at the upper portion thereof for engaging the upper portion of the expansion strip so as to clamp the upper portion of the strip between said plate 25 and the part I of the stem of the T-shaped member. To the lower edge of the strip 28 is formed 1ongitudinally spaced legs 29 similar to the legs I and adapted for positioning at the opposite side of the strip S to clamp the lower edge of the expansion strip therebetween.

Also some of the arms 2 may be formed with the extensions 2| to which the angle-shaped members 22 are bolted, each member 22 having hinged thereto a foot part 23 for resting on the ground. This foot portion when in horizontal position bears against the lower end of the angle- 5 shaped part 22 and when the device is raised from out of the concrete the part 23 will swing downwardly and thus offer the least resistance to its passage through the concrete. Of course,

it will be understood that all of the arms 2 can 55 be provided with these parts 22 and 23 if desired.

As will be seen, the expansion strip S can be readily clamped to the device by moving the plates 4 against the strip after the strip has been placed against the stem of the T-shaped member and then the plates 4 are held in adjusted position by tightening the nuts of the bolts 1 and 9. The device is clamped to the dowel pins by having the pins engage the recesses 3 in the lower ends of the arms 2 and the bar I5 moved by the lever l9 to cause the parts 120i the hooks to engage portions of the bars and when this is done the hooks tend to move the bars upwardly and the recessed ends of the arms 2 tend to press the bars downwardly. The devices are set on the subgrade the proper distance apart and then the concrete is poured and after the concrete has set to a certain degree the bar i5 is moved by the 1ever'l9 to release the hooks H from the pins so that the device can be raised out of the concrete. The strip 20 may be dispensed with if desired, the plates 4 being sufiicient to clamp the expansion strip against the stem I of the T- member I.

'Having described the invention, what is claimed as new is:

1. An expansion joint setting device comprising a T-shaped member, arms extending outwardly from opposite sides of said T-shaped member, the outer ends of the arms extending downwardly and having recesses in their lower ends for receiving portions of dowel pins, means carried by the arms' at one side of the T-shaped member for clamping an expansion strip against the stem of the T, tubular members on the opposite side of the stem and vertically arranged, hooks having portions rotatably arranged in the tubular members and said hooks having crank parts at their upper ends, a bar extending longitudinally of the T-shaped member and supported for sliding movement therein, and said bar having notches therein for receiving the cranks of the hooks for moving the hooks to operative and inoperative position.

2. An expansion joint setting device comprising a T-shaped member, arms extending outwardly from opposite sides of said T-shaped member, the outer ends of the arms extending downwardly and having recesses in their lower ends for receiving portions of dowel pins, means carried by the arms at one side of the T-shaped member for clamping an expansion strip against the stem of the T, tubular members on the opposite side of the stem and vertically arranged, hooks having portions rotatably arranged in the tubular members and said hooks having crank parts at their upper ends, a bar extending longitudinally of the T-shaped member and supported for sliding movement therein, and said bar having notches therein for receiving the cranks of the hooks for moving the hooksto operative and inoperative position, said clamping means including vertically arranged plates having slots in their upper portions and bolts carried by the arms and passing through the slots.

3. An expansion joint setting device comprising a T-shaped member, arms extending outwardly from opposite sides of said T-shaped member, the outer ends of the arms extending downwardly and having recesses in their lower ends for receiving portions of dowel pins, means carried by the arms at one side of the T-shaped member for clamping an expansion strip against the stem of the T, tubular members on the opposite side of the stem and vertically arranged, hooks having portions rotatably arranged in the tubular members and said hooks having crank parts at their upper ends, a bar extending longitudinally of the T-shaped member and supported for sliding movement therein, and said bar having notches therein for receiving the cranks of the hooks for moving the hooks to operative and inoperative position, a projection on the bar and the T-shaped member having a notch therein for receiving a lever which engages the projection for moving the bar longitudinally.

GEORGE T. NELSON. 

